Polyaniline-lignosulfonate(PANI-LS)　nanocomposite　was　prepared　via　an　unstirred　polymerization　by　using　lignosulfonate(LS)　as　dispersant.　The　morphology,　structure　and　properties　of　the　PANI-LS　nanocomposite　were　characterized　by　using　scanning　electron　microscopy,　transmission　electron　microscopy,　FTIR,　UV-vis　spectra　and　wide　angle　X-ray　diffraction.　Moreover,　the　silver　ions　adsorbability　of　the　PANI-LS　nanocomposite　was　examined.　The　maximal　sorption　capacity　of　silver　ions　onto　PANI-LS　nanocomposite　was　up　to　500　mg·g-1　at　initial　silver　ion　concentration　of　0.03　mol·L-1.　The　product　of　PANI-LS　nanocomposite　after　sorption　was　investigated　by　transmission　electron　microscopy　and　wide　angle　X-ray　diffraction.　The　results　showed　that　silver　nanoparticles　with　diameters　of　2-7　nm　were　homogeneously　dispersed　on　the　surface　of　the　PANI-LS　nanocomposite　after　sorption.　This　indicated　that　the　PANI-LS　nanocomposite　possessed　reactive　adsorbability　for　silver　ions.